EP 0819301 A1 19980121 - METHOD AND APPARATUS FOR CREATING DIFFERENT WAVEFORMS WHEN SYNTHESIZING MUSICAL SOUNDS
Title (en)
METHOD AND APPARATUS FOR CREATING DIFFERENT WAVEFORMS WHEN SYNTHESIZING MUSICAL SOUNDS
Title (de)
VERFAHREN UND VORRICHTUNG ZUR ERZEUGUNG VON VERSCHIEDENEN WELLENFORMEN BEI DER SYNTHESIERUNG VON MISICTONEN
Title (fr)
PROCEDE ET DISPOSITIF PERMETTANT DE CREER DIFFERENTES FORMES D'ONDES LORS DE LA SYNTHESE DE SONS MUSICAUX
Publication
Application
Priority
- IB 9600398 W 19960405
- US 41851895 A 19950407
Abstract (en)
[origin: US6091269A] A circuit and method for generating waveforms when synthesizing musical sounds. In one embodiment, the invention provides a multiplexer/shifter which modifies the phase angle input according to the particular waveform desired. Boolean logic gates further modify the multiplexer/shifter output based on the two most significant bits of the phase angle input and according to the particular waveform desired. Finally, a multiplier multiplies the multiplexer/shifter output with the output of the Boolean logic gates to produce the desired waveform. The invention may employ banks of exclusive OR gates and AND gates as the Boolean logic. Another embodiment of the invention provides a waveshaping method where a desired waveform is generated from a phase angle input. The phase angle input is multiplexed/shifted based on the particular waveform desired. The results of the multiplexing/shifting are then modified by Boolean logic gates, based on the two most significant bits of the phase angle input and according to the particular waveform desired. The results of the multiplexing/shifting and the Boolean logic are then multiplied together to produce the desired waveform.
IPC 1-7
IPC 8 full level
G10H 5/10 (2006.01)
CPC (source: EP US)
G10H 5/10 (2013.01 - EP US); G10H 2250/551 (2013.01 - EP US)
Citation (search report)
See references of WO 9631868A1
Designated contracting state (EPC)
DE ES FR GB
DOCDB simple family (publication)
US 6091269 A 20000718; AU 5344796 A 19961023; DE 69619364 D1 20020328; DE 69619364 T2 20020718; EP 0819301 A1 19980121; EP 0819301 B1 20020220; ES 2173277 T3 20021016; JP 3228753 B2 20011112; JP H11503243 A 19990323; TW 326521 B 19980211
DOCDB simple family (application)
US 68238396 A 19960717; AU 5344796 A 19960405; DE 69619364 T 19960405; EP 96910151 A 19960405; ES 96910151 T 19960405; JP 53015296 A 19960405; TW 85104236 A 19960410